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</o:shapelayout></xml><![endif]--></head><body lang=NL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Hi James,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Think you are on the right way.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>In order to reach some 5 knots, I would add a bow and stern fairing on the waterline (Drebbel style?)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Increases the waterline length and give better directional stability. Euronaut and Drebbel run much metter on the surface when some 2-3 deg. stern heavy <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Otherwise it will go nose down and dive under high power…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Both direct drive or generator/ thruster are a good option. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>If I build the generator version, I would buy a 24-48 VDC genset . If not available build it from a 5-8 Kw Diesel engine with 1 or 2 big (100-200 Amp) 24VDC truck dynamo’s.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Pod motor of some 4-5 Kw. I have a steerable rimdrive astern; turns good with only a 35 deg. Angle. Now 60 Kg thrust at 24 VDC but could be over 100 Kg at 48VDC.(8 KW)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Br. Emile<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Van:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>Namens </b>James Frankland via Personal_Submersibles<br><b>Verzonden:</b> maandag 16 april 2018 12:40<br><b>Aan:</b> Personal Submersibles General Discussion<br><b>Onderwerp:</b> [PSUBS-MAILIST] Decision time.<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal> Hi All,<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I need to make a decision how I am going to do the new sub. I'm really not sure quite how to do this, so open to thoughts\suggestions. :)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I have cleared the boat out and its completely stripped. All penetrators etc are removed or loose. Viewports were a real swine to get out, but they are all done with no damage.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The primary design objectives are:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>1. Diesel power for longer surface running.<o:p></o:p></p></div><div><p class=MsoNormal>2. Powerful surface motor.<o:p></o:p></p></div><div><p class=MsoNormal>3. Enclosed tanks for open sea running.<o:p></o:p></p></div><div><p class=MsoNormal>4. Ability to get out on surface and walk around on the deck.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I was initially thinking that I would fit a diesel engine inboard. However, I am now leaning a different way.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I am thinking I should put a powerful electric motor in a pod at the rear, as a live rudder. Kittredge style. It would be able to rotate from rear full 90 degrees left and right, to act as a stern thruster as well.<o:p></o:p></p></div><div><p class=MsoNormal>Motor to have pressure proof housing. Not compensated.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Diesel generator mounted internally instead of a direct drive.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Kittredge style battery pods. Slightly bigger. More batteries, deeper rating.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Drebbel style main tanks.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Any thoughts before I commit? <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Many thanks<o:p></o:p></p></div><div><p class=MsoNormal>James<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><img width=401 height=535 id="_x0000_i1025" src="cid:image002.jpg@01D3D585.296A37F0"><o:p></o:p></p></div><div><p class=MsoNormal><img width=401 height=535 id="_x0000_i1026" src="cid:image004.jpg@01D3D585.296A37F0"><br><br><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>